The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method.
Read more about Pearl Index: Calculation and Usage, History, Criticisms
Famous quotes containing the words pearl and/or index:
“I know of the leafy paths that the witches take
Who come with their crowns of pearl and their spindles of wool,
And their secret smile, out of the depths of the lake....”
—William Butler Yeats (1865–1939)
“Exile as a mode of genius no longer exists; in place of Joyce we have the fragments of work appearing in Index on Censorship.”
—Nadine Gordimer (b. 1923)
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